As I understand it, TB can only access the Inbox, although, I see that if you click on the Junk folder, it finds e-mails - but, I forget to do that - wouldn't it be good if everything went to the Inbox?

So, I have tried bypassing Bulk Mail before in Yahoo Mail, as follows:

Yahoo Mail / Settings / Filters / + Add new filters. . . To delete the filter, highlight it, then click garbage can at the top

Thunderbird can only access the inbox folder on the mail server, if you have a POP account. However, it can access all of the folders on the mail server if you use a IMAP account.

Some email providers provide a setting in webmail to essentially tell the POP server to transparently fetch messages from both the inbox and the bulk mail folder when the email client asks for new mail. The email client is completely unaware of this. The spam is only in the spam/bulk mail folder on the mail server, but gets downloaded into the email clients inbox folder.

https://forums.techguy.org/threads/solv ... er.418712/ is ancient but the next to last post talks about a option in Mail Options -> POP Access and Forwarding in yahoo webmail to control whether the inbox should get any messages that SpamGuard thinks are spam messages. If that still exists, the location and wording might be slightly different. There might be something similar in gmail webmail.

Regarding the link above on the "Yahoo email bulk folder" . . . Yes, it is way out of date (11/21/05) . . . What you can currently do, though, is:

YMail New / Settings / More Settings / Switch to classic Mail (bottom left). . . But, this actually takes you to Basic Mail, which is ok. . . Click in the top right drop-down menu, and select:Options - GoMail Accounts . . . It shows you that you're in "Basic". You can select for "Full featured" here.POP & Forwarding / Access Yahoo Mail via POP. . . there are some Spam options here. . . but, I think I have YMail set up best, with the "@" filter, above. . . so, how do I do that with GMail? There must be a way . . .

YMail . . . How can I permanently disable the spam filter or bypass it completely? I'm tired of marking emails as "Not Spam'" as it is useless.? | Yahoo Answers . . . Create a filter where if the sender does not contain a random string such as "3kgcpwut1iie" then deliver to inbox. Since the random string will never exist all mail goes to the inbox . . . In my experience: This filter will see that the "From" in any e-mail "does not contain" this string (Match case): "3kgcpwut1iie", but it did NOT always move every e-mail to the Inbox, consistently. No idea why. I have deleted this filter . . . https://answers.yahoo.com/question/inde ... 026AAJ3Vc6

Search operators you can use with Gmail - Gmail Help . . . Make a filter so that if there is an "@" sign in From, it is sent to the Inbox . . . Search for an exact word or phrase ... " " ... Example: "dinner and movie tonight" . . . https://support.google.com/mail/answer/7190

02/28/19Some e-mails were going to Junk, but TB didn't show them.I had to manually click "Junk" to see them.Is it that TB can only pull in the Inbox?. . . No, that's with POP, not IMAP. . . It must just not be Refreshing that folder for some reason

03/02/19It still sends some to Junk, and gives me a message when it thinks some are Junk.Should I enable it, and train it?. . . No, see next steps to create a filter that sends everything to the Inbox

1.) Mail Accounts / Each at the bottom gets Spam and Bulk Mail under it - which then disappears?

2.) Junk / Each Mail Account now has its "Inbox" there, also. . . Right-click Junk / Properties . . . It now polls the Inbox?. . . I forget, but if it does, un-check that. . . Just have it poll Spam and Bulk Mail